Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

BancShares Plan

For the three and nine months ended September 30, 2015 and 2014, the components of net periodic benefit cost are as follows:



	Three months ended September 30						Nine months ended September 30
(Dollars in thousands)	2015			2014			2015			2014
Service cost	$	3,358		$	3,081		$	10,561		$	9,247
Interest cost	6,732			6,402			20,230			19,209
Expected return on assets	(8,302		)	(7,296		)	(24,896		)	(23,448		)
Amortization of prior service cost	53			53			158			158
Amortization of net actuarial loss	2,863			769			8,531			3,861
Net periodic benefit cost	$	4,704		$	3,009		$	14,584		$	9,027

Bancorporation Plan

For the three and nine months ended September 30, 2015, the components of net periodic benefit cost are as follows:



	Three months ended September 30			Nine months ended September 30
(Dollars in thousands)	2015			2015
Service cost	$	641		$	2,506
Interest cost	1,540			4,795
Expected return on assets	(2,873		)	(8,612		)
Amortization of prior service cost	—			—
Amortization of net actuarial loss	—			—
Net periodic benefit cost	$	(692	)	$	(1,311	)